ACS - Airfield Construction Service
AFC - Air Force Cross
AM - Air Ministry
AMWD - Air Ministry Works Department
AOA - Air Officer Administration
AOC - Air Office Commanding
ASDIC - Anti-Submarine Detection Investigation Committee
ASR - Air Sea Rescue
AVM - Air Vice Marshall
BBC - British Broadcasting Corporation
CBE - Commander of the British Empire
CROW - Countryside and Rights of Way Act
DSO - Distinguished Service Order
ELINT - Electronic signals Intelligence
F/Lt - Flight Lieutenant
GR - General Reconnaissance
HF/DF - High Frequency Direction Finder
HQ - Headquarters
HQCC - Headquarters Coastal Command
KB - Knight of the Bath
KBE - Knight Commander of the Most Excellent Order of the British Empire
MT - Motor Transport
NAAFI - Navy, Army and Air Force Institutes
OBE - Officer of the Most Excellent Order of the British Empire
ORB - Operations Record Book
OS - Ordnance Survey
PDC - Post Departure Centre
P/O - Pilot Officer
RAF - Royal Air Force
RAFVR - Royal Air Force Volunteer Reserve
RFC - Royal Flying Corps
RNAS - Royal Naval Air Service
RUSBC - Recovery Unit Small Bomb Components
S/Ldr - Squadron Leader
SASO - Station Administrative Senior Officer
SIGINT - Signals Intelligence
SSSI - Site of Special Scientific Interest
U-Boat - the anglicised version of the German word U-Boot, a shortening of Unterseeboot, which means "undersea boat" or submarine.
UK - United Kingdom
USAAF - United States Army Air Forces
WAAF - Women's Auxiliary Air Force
WT - Wireless Telegraphy
WW2 - World War 2